vendor consignment pick up value when doing stock count

Hi experts!

I'm seeking your kindness to help me solve a problem.My client has done a stock count of vendor consignment stock.But why the system pick up the value of the stock when they do adjustment to the system which this item should not have any value as it was under vendor consignment?

When i go to MI20 to check display the list of inventory differences,there's 1200kg with total price rm5146. the qty suppose to be no value but why there's 1200kg in booking?